abstract:Leghemoglobin (also leghaemoglobin or legoglobin) is a nitrogen or oxygen carrier, because naturally occurring oxygen and nitrogen interact similarly with this protein; and a hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. It is produced by legumes in response to the roots being colonized by nitrogen-fixing bacteria, termed rhizobia, as part of the symbiotic interaction between plant and bacterium: roots uninfected with Rhizobium do not synthesise leghemoglobin.
Chromiumtreatmentsignificantlydecreased nodule Numbers, nodule fresh weight, leghemoglobin content and nitrogenase (acetylenereduction) activity per plant or per gram of nodules.